My studies on the electrogenerative reduction of

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Unformatted text preview: chromate solutions (250 ppm, 100 ppm, 50 ppm and 25 ppm Cr(VI)) as the simulated waste -1 water). With a flow-rate of 50 mL min , the galvanic flow cell was able to reduce more than 99 % of hexavalent chromium from an electroplating rinse water sample in 32 3 minutes of operation. ENV-P18 RECOVERY OF COPPER USING AN ELECTRO MP–CELL OPERATED IN AN ELECTROGENERATIVE MODE Suganty d/o Kanapathy, Fong Kay Chun and Norita Mohamed School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: mnorita@usm.my This paper is focused on the performance of an Electro MP –Cell operated in a batch recycle mode for the removal of copper from aqueous solutions. The cell was modified to enables i ts use based on an electrogenerative mode where a spontaneous chemical reaction occurs between the copper/zinc couple without the need for an external power supply. The cell used is a single compartment cell with two conventional electrodes, separated by a membrane and connected by a conducting wire to complete the circuit. Acidic copper (II) sulphate solutions were used as a catholyte and sodium chloride was used as an anolyte. The performance of the cell was evaluated based on various parameters, namely electrolyte flow rate, initial copper (II) concentrations, type of cathode material used (graphite and stainless steel), anolyte concentrations and acidity of catholyte solutions. The rate of recovery was found to be dependent on the parameters studied. Res ults have shown that this system is able to -1 recover 99.9 ± 0.03 % of copper from 500 ppm of acidic Cu(II) solutions at a flow rate of 1000 mL min within 3.5 hours of operation. The Electro MP –cell with graphite as a cathode, zinc as an anode and an anion exchange membrane (Neosepta AM–1) was proposed as the most efficient system in recovering copper in its metallic state. 111 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia ENV-P19 PHOTOCATALYTIC DEGRADATION OF REACTIVE RED 4 BY IMMOBILIZED TiO 2 DEGUSSA P-25 USING ENR/PVC BLEND AS ADHESIV...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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